Hover



March 16 1926a TROVA HOVER 2 sheets-sheet 1 Filed Feb. l5 1923 Patented Mar. i6, 1926.

Unirse' stares einer eiseres.

ERNEST TROVA, 0F S'l. LOUIS, MISSOURI.

HOVER.

Application filed February 15, 1923. Serial No. 619,175.

To all tof/0in t Vmay concern.

Be it known that I, ERNEST Tnova, a citiz'len ot the United States, residing at the city of St. Louis and State of Missouri, have invented a new and useful Hover, of which the following is a specification.

This invention relates to'electrically heated hovers, and consists in the novel construc-.

said controlling means being under the inluence of heat within the hover.

Another object of the invention is to provide a hover including a hover chamber, a heat radiating drum, a heatingelement reniovably supported within the drum, and automatic means for controlling the heating element, the condition of said automatic means being visibly indicated by a Vvisible signal. y

Additional advantages of the construction will be apparent from the following detailed description thereof taken in connection with the accompanying drawings, in which- Fig. l is a plan view.

Fig. 2 is a vertical section.

Fig. 3 is a front elevation et the automatic controlling means for the heater elcinent, with the dial and indicating hand of the indicator removed.

Fig. 4t is a rear elevation of the same.

Fig. 5 is a vertical section on the line 5-5 of Fig. 3.

In the embodiment of the invention illustrated in the drawing the hover is shown as comprising a heat radiating chamber including a cylindrical portion l, upwardly inclined walls 2 and a drum 3, the drum 3 including spaced walls with an intermediate layer of insulating material 4. At the side edges of the drum and supported on a ring 5 is a curtain 6 forming an enclosed space between the bottom of the heat radiating chamber and the curtain. At the center of the drum is an opening for the insertion of the heating element, which opening is closed by the support for the heating element and' the associated parts.

The support for the heating element comprises a metallic ring 7 having a liange 8 for insertion in the opening in the drum. A handle S) is provided 'for the support so that the heating element may be readily raised out ot its position and inserted. Supported by the ring 8 is a disc l0 ot' insulating inaterial. Depending from the under :tace of the disc l0 are straps ll supporting a cyl.- inder l2 of insulating material upon which a resistance coil 13 is wound.

The straps ll constitute the terininalelements et the resistance coil and have con nected to their upper ends the lea-ds le of aV light socket l5 in which is mounted -a light bulb 16. The leads 1T are connected with an automatic heat controlling switch the de tailed structure ot which is the subject matter of my co-pending application iiled July 17, 1922, Serial No. nl. It is suticient Yfor the purpose of the present application to say that the switch includes a casing 18 supported on the top face of the disc l0. A heat responsive element 19 is connected with and extends into the casing` at one end and downwardly into the heat radiating cham.

ber at the other end having an angular branch 2O located at a slight distance above the bottom wall of the heat radiating chamber. The standard ot' the heat responsive tube is encased in a cylinder 2l of heat insulating material so that the zone of heat adjacent to the branch20 controls the opera-I tion et the tube. The heat responsive element is of the Bourdon tube type and has its upper end connected by a link 22 with a slotted arm 23. The arm 23 is pivoted for rocking movement and carries at its outer end a rack 24 which engages a pinion 25 on a shaft 26, said shaft 26 carrying theindieating hand 27 at its outer end.

The switch elements are connected on an insulated block 28, said block being supported on a Vplate 29. A spring plate contact member 30 has one of the leads connected thereto and a contact plate 8l has the other lead connected thereto. The pla-te 3l is free at its outer end and is engaged by a pin 32 connected near the end of the heat responsive element. rihe plate 29 is raised and lowered by means of a set screw 33, so that it may be adjusted in a way that the contact between the ends ot the plates 30 and 3l respectively is broken a greater or less deg-ree of movement of the' end of the heatresponsive element. It will' be under-- rit) stood that the light is in thesan'iefcircuit so that when the circuit closed the light will indicate visually that condition of the circuit.

lVhile the form ot heat controlling ele-4 ment illustrated and described is preferable, it will be understood that other forms of heat controlling elements may be used it desired.

ln order to protect the depending* structure supported by the plate l0 a cylindrical cage 3l isprovided.

l am, aware that the invention may be modified incertain particulars without departing 'from the spirit and scope of the invention. l do not restrict myself unessentially, but ,what I claim and desireto secure by Letters- Patent is l. A hover: comprising la ,chamber composed ol an upright walha wall united with and flaring upwardly and .outwardly from the upper end o't said upright wall, `and a,

top wall connected with the outer edge ol: said flaring wall; an electric heater supported withinsaid chamber in the plane of the s paee between said flaring' and top walls, and means extending' below said heatervand responsive to the heat below the heater and near the bottom of the hover-to control the heater.

2.V A hover comprising a chamber corn-` and flaring upwardlyand outwardly lrom the vupper end ofisaid upright. wall, and a top wall connected with the outer edge ot said flaring wall; an electric heater supported within said chamber in the plane Vof the space "between said flaring' and top walls; an electric circuit for supplying energy to said heater; mechanism supported above the top wall for opening' and closing said circuit; and a heat responsive device extending from said mechanism into said chamber toa planenear the bottom ot-the hover and below said heater to yopen said circuit.

8. A. device of the character described, comprising' a heat radiating' chamber coniposed of an upright wall portion and a wall portion.v flaring upwardly and outwardly from said upright portion, said chamber hav-ing anopening'in the top thereof, an insnlating` vsupport mounted in said opening, a heatingelement suspended from saidysupport and being on a plane substantially at the juncture oi the walls of-said heating chamber., and a heat responsive element 'tor controlling the circuit ot said heating,- element, said vheat responsive element having a member,extending downwardly in the heat radiatingchamber, and an insulating' tube for said member.leavingr exposed the lower end thereof so that it is responsive to the heat; intlie lower strata of said chamber.

ERNEST TROVA. 

